Modes of Heat Transfer

Mode of Heat Tranfer
Under the ordinary conditions of everyday life about 60% of total loss of heat from the body is accounted for by the process of radiation. Convection of course depends on air temperature and rate of movement, but in ordinary room conditions in a resting state a patient loses about 15% of his total heat loss by this means.

Vaporization of water is not dependent on the secretion of sweat entirely, since fluid moving out of the peripheral capillaries seeps into the epidermis from which it passes to the environment in accordance with the existing laws of vapour pressure of the atmosphere. This fluid loss accounts for from 22 to 27% of the total heat loss under ordinary conditions.